/* ==========================================================================
   Dronium - Design System
   (c) 2026 by neonotu GmbH
   
   ========================================================================== */

:root {
  --color-ink: #0b0b0c;
  --color-ink-soft: #2b2b2e;
  --color-bg: #faf9f7;
  --color-bg-raised: #ffffff;
  --color-muted: #6b6b6e;
  --color-line: #dcdad5;
  --color-accent: #e62d22;
  --color-accent-ink: #0b0b0c;

  --font-display: -apple-system, "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --font-body: -apple-system, "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --container-max: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-space: clamp(4rem, 10vw, 8rem);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

:root[data-theme="dark"] {
  --color-ink: #f4f3f0;
  --color-ink-soft: #d8d7d3;
  --color-bg: #0b0b0c;
  --color-bg-raised: #141415;
  --color-muted: #8f8f92;
  --color-line: #2a2a2c;
  --color-accent: #ff6a33;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-ink: #f4f3f0;
    --color-ink-soft: #d8d7d3;
    --color-bg: #0b0b0c;
    --color-bg-raised: #141415;
    --color-muted: #8f8f92;
    --color-line: #2a2a2c;
    --color-accent: #ff4433;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Typography ------------------------------------------------------------ */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 0.5em;
}

.h-display {
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.h-section {
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
  font-weight: 700;
}

.h-card {
  font-size: 1.35rem;
  font-weight: 700;
}

p { margin: 0 0 1.2em; }

.lede {
  font-size: clamp(1.1rem, 1.6vw, 1.4rem);
  color: var(--color-ink-soft);
  max-width: 46em;
}

.muted { color: var(--color-muted); }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--color-accent);
}

/* Links & buttons --------------------------------------------------------- */

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 0.15em;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), gap 0.25s var(--ease);
}

.link-arrow:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  gap: 0.75em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.9em 1.7em;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--color-ink);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.2s var(--ease);
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #0b0b0c;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
}
.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Header ------------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-icon { width: 28px; height: 28px; flex-shrink: 0; }
.logo-wordmark { height: 32px; width: auto; display: block; }

/* The wordmark PNG is ink-black; invert it to read as light ink on dark backgrounds. */
:root[data-theme="dark"] .logo-wordmark { filter: invert(1); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .logo-wordmark { filter: invert(1); }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2.25rem);
}

.main-nav a:not(.btn) {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  transition: color 0.2s var(--ease);
}
.main-nav a:not(.btn):hover,
.main-nav a:not(.btn).is-active { color: var(--color-ink); }

.main-nav .btn { padding: 0.6em 1.3em; font-size: 0.9rem; text-decoration: none; }

.lang-switch { position: relative; }

.lang-switch-trigger {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.4em 0.7em;
  background: transparent;
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.lang-switch-trigger:hover { color: var(--color-ink); border-color: var(--color-ink-soft); }
.lang-switch-caret { transition: transform 0.18s var(--ease); }
.lang-switch.is-open .lang-switch-caret { transform: rotate(180deg); }

.lang-switch-panel {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  min-width: 160px;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  padding: 0.5rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
  z-index: 60;
}
.lang-switch.is-open .lang-switch-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.lang-switch-panel a {
  display: block;
  padding: 0.5em 0.75em;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--color-ink-soft);
}
.lang-switch-panel a:hover { background: var(--color-line); color: var(--color-ink); }
.lang-switch-panel a.is-active { color: var(--color-ink); font-weight: 600; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: transparent;
  color: var(--color-ink-soft);
  cursor: pointer;
  padding: 0;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.theme-toggle:hover { color: var(--color-accent); border-color: var(--color-accent); }

.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-ink);
  cursor: pointer;
}

.nav-dropdown { position: relative; }

@media (min-width: 781px) {
  .nav-dropdown-panel {
    position: absolute;
    top: 100%;
    left: 50%;
    min-width: 260px;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    border-radius: 12px;
    padding: 0.6rem;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(-50%) translateY(4px);
    transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
    z-index: 50;
  }
  .nav-dropdown:hover .nav-dropdown-panel,
  .nav-dropdown:focus-within .nav-dropdown-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }
  .nav-dropdown-panel a {
    display: block;
    padding: 0.5em 0.75em;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    white-space: nowrap;
    color: var(--color-ink-soft) !important;
  }
  .nav-dropdown-panel a:hover { background: var(--color-line); color: var(--color-ink) !important; }
}

/* Sections ------------------------------------------------------------- */

section {
  padding: var(--section-space) 0;
  border-bottom: 1px solid var(--color-line);
}

section:last-of-type { border-bottom: none; }

.hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(4rem, 12vw, 9rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.hero-bg {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(62%, 760px);
  object-fit: cover;
  object-position: center 20%;
  opacity: 0.16; /* default = light theme: image is dark, so it must stay subtle */
  -webkit-mask-image: linear-gradient(to right, transparent, black 55%);
  mask-image: linear-gradient(to right, transparent, black 55%);
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.3s var(--ease);
}

:root[data-theme="dark"] .hero-bg { opacity: 0.55; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .hero-bg { opacity: 0.55; }
}

.hero > .container { position: relative; z-index: 1; }

@media (max-width: 860px) {
  .hero-bg {
    width: 100%;
    opacity: 0.1;
    -webkit-mask-image: linear-gradient(to bottom, transparent, black 35%, black 75%, transparent);
    mask-image: linear-gradient(to bottom, transparent, black 35%, black 75%, transparent);
  }
  :root[data-theme="dark"] .hero-bg { opacity: 0.3; }
}

@media (max-width: 860px) and (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .hero-bg { opacity: 0.3; }
}

.hero .h-display { max-width: 16ch; }

.hero-meta {
  display: flex;
  gap: clamp(1.5rem, 4vw, 4rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--color-line);
}

.hero-meta div { max-width: 22ch; font-size: 0.95rem; color: var(--color-muted); }

/* Grid of cards --------------------------------------------------------- */

.grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  border-top: 1px solid var(--color-line);
  padding-top: 1.75rem;
}

.card .index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  display: block;
  margin-bottom: 1rem;
}

.card img {
  border-radius: 4px;
  margin-bottom: 1.25rem;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--color-line);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.25em 0.7em;
}

/* Benefit list (checkmark-style, used on Leistungen/DroniumApp detail pages) */

.benefit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.benefit-list li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--color-ink-soft);
}

.benefit-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.location-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.location-list li { color: var(--color-ink-soft); }

/* Numbered section header ------------------------------------------------ */

.section-head {
  display: flex;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: baseline;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.section-num {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* Two column layout ------------------------------------------------------- */

.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
}

.split-reverse > *:first-child { order: 2; }
.split-reverse > *:last-child { order: 1; }
@media (max-width: 860px) {
  .split-reverse > *:first-child { order: 1; }
  .split-reverse > *:last-child { order: 2; }
}

/* Timeline ---------------------------------------------------------------- */

.timeline { display: grid; gap: 0; }
.timeline-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: 2rem 0;
  border-top: 1px solid var(--color-line);
}
.timeline-row:last-child { border-bottom: 1px solid var(--color-line); }
.timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent);
}

/* Stats --------------------------------------------------------------- */

.stat-big {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-accent);
  line-height: 1;
}

/* Forms ------------------------------------------------------------------ */

form .field { margin-bottom: 1.4rem; }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-ink-soft);
}

input[type="text"],
input[type="tel"],
input[type="email"],
select,
textarea {
  width: 100%;
  font: inherit;
  color: var(--color-ink);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-line);
  border-radius: 6px;
  padding: 0.85em 1em;
  transition: border-color 0.2s var(--ease);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

textarea { min-height: 140px; resize: vertical; }

.field-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.4rem;
}

.hp-field { position: absolute; left: -9999px; }

.form-note {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 1rem;
}

.alert {
  padding: 1em 1.25em;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.alert-success { background: color-mix(in srgb, var(--color-accent) 15%, transparent); border: 1px solid var(--color-accent); }
.alert-error { background: color-mix(in srgb, #d1453b 15%, transparent); border: 1px solid #d1453b; }

/* Footer ------------------------------------------------------------------ */

.site-footer {
  padding: var(--section-space) 0 2.5rem;
  border-top: 1px solid var(--color-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.footer-grid h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.6rem; }
.footer-grid a { text-decoration: none; font-size: 0.95rem; }
.footer-grid a:hover { color: var(--color-accent); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer-bottom a { text-decoration: none; }
.footer-bottom a:hover { color: var(--color-accent); }

.footer-link-btn {
  font: inherit;
  color: var(--color-muted);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
}
.footer-link-btn:hover { color: var(--color-accent); }

/* Cookie consent banner ---------------------------------------------------- */

.cookie-banner {
  position: fixed;
  left: 1.25rem;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 300;
  max-width: 640px;
  margin: 0 auto;
}

.cookie-banner[hidden] { display: none; }

.cookie-banner-inner {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.cookie-banner p {
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
  color: var(--color-ink-soft);
}

.cookie-banner-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.cookie-banner-actions .btn {
  padding: 0.65em 1.4em;
  font-size: 0.9rem;
}

.newsletter-form {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.75rem;
}
.newsletter-form input { flex: 1; }

/* Reveal animation --------------------------------------------------------- */

/* Visible by default: JS opts elements into the hidden "pending" state right
   before observing them, so content never depends on JS/IntersectionObserver
   succeeding to be seen (progressive enhancement, not a requirement). */
[data-reveal].reveal-pending {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
[data-reveal].reveal-pending.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Mobile nav --------------------------------------------------------------- */

@media (max-width: 780px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed;
    inset: 76px 0 0 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem var(--gutter);
    gap: 1.75rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  }
  .main-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .main-nav a { font-size: 1.3rem; }
  .main-nav { overflow-y: auto; }
  .nav-dropdown { display: flex; flex-direction: column; align-items: flex-start; gap: 0.9rem; width: 100%; }
  .nav-dropdown-panel {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    padding-left: 1rem;
    border-left: 1px solid var(--color-line);
  }
  .nav-dropdown-panel a { font-size: 1rem; color: var(--color-ink-soft); text-decoration: none; }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.75em 1.25em;
  z-index: 200;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* Legal / prose pages ------------------------------------------------------ */

.prose { max-width: 70ch; }
.prose h2 { font-size: 1.4rem; margin-top: 2.5rem; }
.prose h3 { font-size: 1.1rem; margin-top: 1.75rem; }
.prose p, .prose li { color: var(--color-ink-soft); }
.prose a { color: var(--color-accent); }